Fan 2 keeps blowing fuses.
Thread Starter
Instructor
Joined: Feb 2004
Posts: 144
Likes: 0
From: San Bernardino Ca
Fan 2 keeps blowing fuses.
I have a 2003 6 speed, while driving in traffic I had noticed my temperature reaching 240's. The temperature never dropped back down. I then noticed the maxifuse for fan 2 was blown. Replaced the fuse then day later same deal. This time it kept blowing the fuses once the fan started on. I then switched the fans with my other vette to see if it was the fans. It still keeps blowing the 30 amp maxifuse. I have also checked the relays and the look ok any advice would be appreciated.
Thread Starter
Instructor
Joined: Feb 2004
Posts: 144
Likes: 0
From: San Bernardino Ca
Wow 8VETTE7 thanks for the diagram that is very helpful. Prior tho this I did swap the ignition relay and fan 2 but it still continued to burn the fuses. I will go ahead and swap the relays with the other vette and see what happens.
Tech Contributor
Joined: May 2008
Posts: 3,100
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From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
In the Fan 1 mode, both fans are connected is series and should be running at low speed.
In the Fan 2 mode, both fans are connected in parallel and should be running at high speed.
Thread Starter
Instructor
Joined: Feb 2004
Posts: 144
Likes: 0
From: San Bernardino Ca
Fan 2 is working now without blowing a fuse, I have noticed fan 2 only comes on when temp is above 235 then once temp drops it shuts off while fan 1 keeps going. I still have not seen both fans kick in at low speeds. I will just replace the relays to be on the safe side as they are not blowing no more Maxifuses.
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Yes, from your description either relay 44 is stuck on or the wiring or fan for what you're calling cooling fan #2 or right fan on the schematic is causing a higher current draw to ground. It's possible the wire is damaged but not shorted, not too likely but possible. I could definately see this happening if the motor for that fan is failing.
